Feeder in paper-sheet folding machine



Oct. 1, 1957 K. RUNZl 2,808,260

FEEDER IN PAPER-SHEET FOLDING MACHINE Filed Aug. 5, 1955 United States Patent FEEDER IN PAPER-SHEET FOLDING MACHINE Kurt Riinzi, Bern, Switzerland Application August 5, 1955, Serial No. 526,585

Claims priority, application Switzerland August 9, 1954 3 Claims. (Cl. 271-36) The present invention relates to improvements in the feeding mechanism of paper-sheet folding machines. The

feeder according to this invention is characterized by a feeding roller adapted to be driven by the feed cylinder.

One form of the present invention is illustrated in the accompanying drawing, in which Fig. 1 shows a side view with feed cylinder and stack table, and

Fig. 2 shows a rear view.

Numeral 1 denotes the axle of the feed cylinder 2 of a paper-sheet folding machine such as is described and shown, for example in application Ser. No. 385,756. Practice has shown that with some types of paper said cylinder alone does not suflice to ensure the automatic feed of a sheet to be folded from a stack 3 deposited on an inclined table 4. Such disadvantage is avoided by the provision of a feeder.

In the example shown, said feeder comprises a U- shaped frame 5 consisting of two parallel walls 6 and a crosspiece 7 interconnecting same. Each of said walls 6 at its rear end, i. e. at the right-hand end in Fig. 1, comprises a bearing fork 8 destined to be mounted on the axle 1 of a feed'cylinder 2. The spacing of the two walls 6 is chosen so that cylinder 2 may enter between the two forks 8. In the walls 6 is mounted a friction roller 9 on the one hand, and, on the other hand, a feed roller 10, which rollers are rotatably mounted on axles 11 and 12 respectively. The latter are axially secured by means of spring rings 13 and 14 respectively. Each of the two rollers 9 and comprises a peripheral layer of rough rubber, the coating 10a of feed roller 10 extending only over the central portion of the latter. The axle pin 11 of friction roller 9 passes through the walls 6 in two elongated holes 15 so that friction roller 9 is held movable in the direction of said hole. To axle pin 11 on the one hand and to a rigid pin 16 held in the Walls 6, on the other hand, are secured the ends of two helical springs 17 so that friction roller 9 is constantly urged resiliently against feed roller 10. When the feeder 5 to 17 is mounted on the axle 1 of feed cylinder 2, friction roller 9 thus is constantly urged resiliently against feed cylinder 2.

From this construction follows that the rotation of ice mechanism, to ensure the automatic feed also of such types of paper which so far have occasionally caused trouble when the feed means were limited to feed cylinder 2 alone.

I claim:

1. In a paper sheet folding machine including a feed cylinder rotatably mounted on a shaft and a feed table inclined toward the axis of the feed cylinder and arranged 9 adjacent to the feed cylinder; feeder means comprising a frame having a pair of spaced apart, parallel, interconnected bearing plates, feed roller means rotatably mounted in said bearing plates and operatively interposed between the feed cylinder and sheets on the feed table, said plates having forks detachably fitted on the shaft of the feed cylinder so as to position the feed roller means in peripheral frictional operative engagement with the feed cylinder.

2. In a paper sheetfolding machine including a feed cylinder rotatably mounted on a shaft and a feed table inclined toward the axis of the feed cylinder and arranged adjacent to the feed cylinder; feeder means comprising a frame having a pair of spaced apart, parallel, interconnected bearing plates, feed roller means rotatably mounted in said bearing plates and operatively interposed between the feed cylinder and sheets on the feed table, said plates having forks detachably fitted on the shaft of the feed cylinder so as to position the feed roller means in peripheral frictional operative engagement with the .feed'cylinder, said feed roller means including a feed References Cited in the file of this patent UNITED STATES PATENTS Anderson Feb. 7, 1956 FOREIGN PATENTS r 12,724 Great Britain May 23, 1914. 

